Gas and dust in the star-forming regionρ Oph A
نویسندگان
چکیده
منابع مشابه
Dense Star-forming Gas and Dust in the Magellanic Clouds
The early stages of the star formation process are closely related to the condition of the parent interstellar medium, in particular to the heating/cooling balance, which itself is a function of ambient conditions. Important questions such as dust abundance, size distribution, temperature distribution, fraction of molecular gas, fraction of dense gas, gas surface density and total amount of gas...
متن کاملOxygen in dense interstellar gas ? The oxygen abundance of the star forming core ρ Oph A
Context. Oxygen is the third most abundant element in the universe, but its chemistry in the interstellar medium is still not well understood. Aims. In order to critically examine the entire oxygen budget, we attempt here initially to estimate the abundance of atomic oxygen, O, in the only one region, where molecular oxygen, O2, has been detected to date. Methods. We analyse ISOCAM-CVF spectral...
متن کاملThe composition of circumstellar gas and dust in 51 Oph ⋆
We analyze ISO archive data of the nearby bright emission-line star 51 Oph, previously classified as a protoplanetary system similar to β Pic. The infrared spectrum reveals the presence of gas-phase emission bands of hot (∼ 850 K) CO, CO2, H2O and NO. In addition to this, partially crystalline silicate dust is present. The solid-state bands and the energy distribution are indicative of dust tha...
متن کاملProbing the Ism near Star Forming Regions with Grb Afterglow Spectroscopy: Gas, Metals, and Dust
We study the chemical abundances of the interstellar medium surrounding high z gamma-ray bursts (GRBs) through analysis of the damped Lyα systems (DLAs) identified in afterglow spectra. These GRB-DLAs are characterized by large H I column densities NHI and metallicities [M/H[ spanning 1/100 to nearly solar, with median [M/H[ > −1 dex. The majority of GRB-DLAs have [M/H[ values exceeding the cos...
متن کاملDust and gas in star forming galaxies at z ~ 3 - extending galaxy uniformity
We present millimetre dust emission measurements of two Lyman Break Galaxies at z ∼ 3 and construct for the first time fully sampled infrared spectral energy distributions (SEDs), from mid-IR to the Rayleigh-Jeans tail, of individually detected, unlensed, UV-selected, main sequence (MS) galaxies at z = 3. The SED modelling of the two sources confirms previous findings, based on stacked ensemble...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2015
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201525641